Feature:1. There is a soft knit cover to prevent the hot surface from being in direct contact with your skin to cause burns.2. Microwave oven available, can be heated by microwave oven, take off the knit cover and fill in cold water, the heating time less 3 minutes and the heating power should be not over 1500W.3. Made from food grade silicone, odorless and recyclable, durable, safe and eco-friendly.4. Large capacity and wide mouth design, easy to fill up water.5. Fill with cold water then put it into refrigerator, you will get a ice bag. The silicone water bag can be used as a cold compress for pains, sports injuries, fever and reduce swelling.6. It is the best gift for friends or families, the hot & cold water bottle can be used in different seasons. It can keep you warm in cold days, it also can be used as an ice pack.Specification:Condition: 100% Brand NewItem Type: Hot Water BagMaterial: Silicone + PC + Knitted FabricColor: White, Blue, Gray, Pink(Optional)Size: Approx.24x9.5cm/9.5x3.7in(L x W)Caliber: Approx.22mm/0.9inWeight: Approx.265g/9.3ozApplicable Scene: For keeping warm at home, keep warm when traveling. Applicable to physical fatigue, physique cold people and women in physiological period.Two Ways to Use:1.a. Fill the bag with cold water. b. (Remove the braided sleeve before placing it in the microwave oven). When the microwave oven is heated, be sure to fill the bag with 100% water! c. Put in the microwave oven, the heating power is <1500W, set the high fire position heating, the heating time is ≤3min. d. Put on the knit sleeve and start using it.2.a. Injecting water at 90 °C ± 2 °C, the injection volume is preferably 3/4. b. Drain excess a